It seems MachO does not like padding between text block in __text
section. Unlike in Elf, there is no size information in symbol
struct `nlist_64`.
Signed-off-by: Jakub Konka <kubkon@jakubkonka.com>
Fixes a bug where the last written load command would accidentally
override the beginning of the __text section. Also defines missing
MachO constants and relocation structs/enums.
Signed-off-by: Jakub Konka <kubkon@jakubkonka.com>
* Add a size_hint parameter to the read{toEnd,File}AllocOptions fns
* Rename readAllAlloc{,Options} to readToEndAlloc{,Options} as they
don't rewind the file before reading
* Fix missing rewind in test case
Added std.coff.MachineType
Added image characteristic and section flag valued to std.coff
Added std.Target.Cpu.Arch.toCoffMachine
Fixed stage2 --watch flag on windows
This commit adds enough Mach-O linker implementation to write out simple
Mach-O object file. Be warned however, the object file is largely incomplete:
misses relocation info, debug symbols, etc. However, it seemed like a
good starting to get the basic understanding right.
Signed-off-by: Jakub Konka <kubkon@jakubkonka.com>
* improve the ZIR generated of variable decls
- utilize the same ZIR for the type and init value when possible
- init value gets a result location with the variable type.
no manual coercion is required.
* no longer use return instructions to extract values out of comptime
blocks. Instead run the analysis and then look at the corresponding
analyzed instruction, relying on the comptime mechanism to report
errors when something could not be comptime evaluated.
* Move branch-local register and stack allocation metadata to the
function-local struct. Conditional branches clone this data in order
to restore it after generating machine code for a branch.
Branch-local data is now only the instruction table mapping *ir.Inst
to MCValue.
* Implement conditional branching
- Process operand deaths
- Handle register and stack allocation metadata
* Avoid storing unreferenced or void typed instructions into
the branch-local instruction table.
* Fix integer types reporting the wrong value for hasCodeGenBits.
* Remove the codegen optimization for eliding length-0 jumps. I need to
reexamine how this works because it was causing invalid jumps to be
emitted.
While we try to work out what the correlation between the OS and runtime
versions is, this commit hardcodes the latter to the minimum (compat)
version of 1.0.0.
Signed-off-by: Jakub Konka <kubkon@jakubkonka.com>
